We guess that whole cheating scandal with her also married-at-the-time director last year must have brought the marriage to a place that they just couldn't come back from!

Which is, ya know, totally understandable when you cheat on someone/you're cheated on!

The former Smash star's rep released a statement confirming the sad news.

Her rep said:

"After six years of marriage, and having been separated for the past year, Katharine McPhee has filed for a dissolution of marriage from Nick Cokas. The two have an amicable relationship and will remain friends. They ask that people respect their privacy during this time."

Well, that's good that that it's at least a friendly split!

Let's hope things don't get TOO messy in the actual divorce and they manage to remain friends after they're both officially single!